Rear shock absorber — removal and installation (Opel Vectra A)

Removal

1. Please note that on models with a single overhead camshaft (SOHC), only one shock absorber must be removed at a time. Shock absorbers should be changed in pairs.

2. On models with manual rear suspension damping control, depressurize the system by releasing air through the valve in the luggage compartment.

3. Working in the luggage compartment, remove the cover covering the upper shock absorber mount. On hatchback models, remove the flap covering the first aid kit and warning triangle storage compartment to gain access to the right shock absorber.

4. Hold the shock absorber piston rod stationary and unscrew the shock absorber upper mounting nut (see illustration). Remove the washer and the rubber part of the upper mount.

5. Drive the vehicle with the rear wheels on an overpass and lock the front wheels. Alternatively, lock the front wheels, then jack up the rear of the vehicle and set the vehicle on the centerline struts. If the vehicle is jacked up, jack up the appropriate longitudinal suspension arm (diagonal arm, dual overhead camshaft (DOHC) models).

6. Working under the rear of the vehicle, disconnect the manual damping control air duct from the shock absorber where applicable.

7. Unscrew and remove the bolt and washer securing the lower end of the shock absorber to the longitudinal suspension arm (diagonal arm on models with two overhead camshafts (DOHC)) (see illustration).

8. On models with a single overhead camshaft (SOHC), squeeze the shock absorber manually and release its lower end from the trailing arm.



9. Remove the shock absorber from under the car and remove the rubber portion of the lower mount, as well as the cup from the upper end of the shock absorber.

10. To check the shock absorber for proper operation, clamp the lower mounting eye in a vice, then fully compress and extend the shock absorber several times. If the shock absorber parts move unevenly, jerkily, or if there is a lack of resistance, replace the unit.

Installation

11. Before installing the shock absorber, inspect the rubber cushions for signs of wear and damage and replace them if necessary.

12. Perform installation in reverse order, paying attention to the following.

13. Where applicable, ensure that the shock absorber air duct coupling is positioned correctly.

14. Tighten the lower shock absorber mounting bolt to the specified tightening torque Specifications.

15. On models with manual rear suspension stiffness control, increase the pressure in the system to 0.8 bar and check the system for air leaks.